Specifier indicating whether the time marker string (AM or PM) precedes or follows the time string. The registry value is iTimePrefix for compatibility with previous Asian versions of Windows. The specifier must have one of the following values. No user-specified values are allowed. It is preferred for your application to use the LOCALE_STIMEFORMAT constant instead of LOCALE_ITIMEMARKPOSN.

Value Meaning
0 Use as suffix.
1 Use as prefix.